package collection;

import java.util.ArrayList;
import java.util.Collection;
public class CollectionDemo {
    public static void main(String[] args) {
//        Collection c =new ArrayList();
//        c.add("one");
//        c.add("two");
//        c.add("three");
//        c.add("four");
//        c.add("five");
//        System.out.println(c);
//
//
//        System.out.println("size:"+c.size());
//        System.out.println("是否为空集"+c.isEmpty());
//
//
//        c.clear();
//        System.out.println("清空");
//        System.out.println(c);
//        System.out.println("size"+c.size());
//        System.out.println("是否为空集"+c.isEmpty());


        Collection c=new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point (5,6));
        c.add(new Point (7,8));
        c.add(new Point(9,0));
        c.add(new Point(1,2));
        System.out.println(c);


        Point p=new Point(1,2);
        boolean contains=c.contains(p);
        System.out.println("是否包含："+contains);

        c.remove(p);
        System.out.println(c);

        Collection cc=new ArrayList();
        Point pp=new Point (1,2);
        cc.add(pp);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        pp.setX(200);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

    }
}
